THE DISTRIBUTION OF ANIMALS AND PLANTS AS RELATED TO GEOGRAPHICAL AND GEOLOGICAL CHANGES.

DEDICATED TO THE MEMORY OF MY LATE FRIEND, MR. GWYN JEFFRIES, who so ably investigated the Distribution of Oceanic Molluska, more especially in the North Atlantic.

Changes of Climate and of Land and Water with Reference to Distribution of Life—Regions of the Continents—Insular Faunas and Floras—Their History Applications to Geology and to Man—Geological Time—Theories of Introduction And Migration

Distribution of Animals in Time. (p. 420.) Vertebrata. 1, Ganoid Fishes; 2, Teliort Fishes; 3, Batrachians; 4, Reptiles; 5, Birds; 6, Mammals. Invertebrata. 1, Trilobites, etc.; 2, Worms; 3, Bivalve and Univalve Shellfishes; 4, Nautiloid Shellfishes; 5, Cuttlefishes; 6, Brachiopods. It will be noticed that Nos. 2 and 5 in the first table, and 3 and 5 in the second, follow a different order of curve from the others, indicating their exceptional culmination in modern times.